feat(capture): add --name flag

cmd/capture.go

@@ -29,6 +29,7 @@ var commandOutput bool
 var libbpfOutput bool
 var save bool
 var directory string
+var filename string
 
 // captureCmd represents the create args
 var captureCmd = &cobra.Command{
@@ -54,6 +55,7 @@ by passing the function name symbol and the binary args.
 
 			saveOpts := writer.WriteOptions{
 				Save:      save,
+				FileName:  filename,
 				Directory: directory,
 			}
 			if err := writer.Write(syscalls, functionSymbols, saveOpts); err != nil {
@@ -75,6 +77,7 @@ func init() {
 	captureCmd.Flags().BoolVarP(&libbpfOutput, "include-libbpf-output", "l", false, "Include the libbpf output")
 
 	captureCmd.Flags().BoolVarP(&save, "save", "S", false, "Save output to a file")
+	captureCmd.Flags().StringVarP(&filename, "name", "n", "", "Specify a name for saved output")
 	captureCmd.Flags().StringVarP(&directory, "directory", "D", "", "Directory to use to store saved files")
 	captureCmd.MarkFlagsRequiredTogether("save", "directory")
 }

internal/writer/write.go

@@ -11,13 +11,17 @@ import (
 
 type WriteOptions struct {
 	Save      bool
+	FileName  string
 	Directory string
 }
 
 func Write(syscalls []uint32, functionSymbol string, opts WriteOptions) error {
 	var errOut error
 	if opts.Save {
 		fileName := archiver.Convert(functionSymbol)
+		if opts.FileName != "" {
+			fileName = opts.FileName
+		}
 		err := os.MkdirAll(opts.Directory, os.ModePerm)
 		if err != nil {
 			return fmt.Errorf("error creating directory: %v", err)